<template>
<div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper"
                        v-for="item of hot"
                        :key="item.id"
                        @click="handleCityClick(item.name)"
                        >
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area"
                v-for="(item,key) of cities"
                :key="key"
                :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list"
                    v-for="innerItem of item"
                    :key="innerItem.id"
                     @click="handleCityClick(innerItem.name)"
                >
                    <div class="item border-bottom">{{innerItem.name}}</div>
                </div>
            </div>
      </div>
</div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapState ,mapMutations} from 'vuex'
    export default {
        name: "CityList",
        props:{
         cities:Object,
         hot:Array,
         letter:String
        },
        computed:{
            ...mapState({
                currentCity:'city'
            })
        },
        methods:{
            handleCityClick(city){
               // dispatch 分发到vuex的actions方法
               //this.$store.commit('changeCity',city)
               this.changeCity(city)
               this.$router.push('/')
            },
            ...mapMutations(['changeCity'])
        },
        mounted(){
            this.scroll = new Bscroll(this.$refs.wrapper)
        },
        watch:{
            letter(){
                if(this.letter){
                    const element = this.$refs[this.letter][0]
                    this.scroll.scrollToElement(element)
                }
            }
        }
    }
</script>

<style lang="stylus" scoped>
    @import '../../assets/style/varibles.styl'
.list
    position absolute
    overflow hidden
    top: 1.62rem
    left:0
    right:0
    bottom:0
    .border-topbottom
        &:before
            border-color #ccc
        &:after
            border-color #ccc
    .border-bottom
        &:after
            border-color #ccc
    .title
        line-height .54rem
        background #eee
        padding-left .2rem
        color: #666
        font-size .26rem
    .button-list
        overflow: hidden
        padding .1rem .6rem .1rem .1rem
        .button-wrapper
            float left
            width: 29%
            text-align center
            margin .1rem
            padding .1rem 0
            border .02rem solid #ccc
            border-radius .06rem
    .item-list
        .item
            line-height .76rem
            color: #666
            padding-left .4rem
</style>